A radical ion-pair complex exhibiting strong C-H⋯O H-bonding interaction, moderately broaden near-IR absorbance and complicated EPR spectrum

Jian Lan Liu; Qi Liu; Yun Xia Sui; Bing Qian Yao; Xiao Ming Ren; Hui Zhang; Hai Bao Duan; Qing Jin Meng

doi:10.1016/j.inoche.2010.03.047

A radical ion-pair complex exhibiting strong C-H⋯O H-bonding interaction, moderately broaden near-IR absorbance and complicated EPR spectrum

Jian Lan Liu, Qi Liu, Yun Xia Sui, Bing Qian Yao, Xiao Ming Ren, Hui Zhang, Hai Bao Duan, Qing Jin Meng

School of Chemistry and Moleculai Engineering

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

An ion-pair complex of [Ni(mnt)₂]^2- with p-N-benzylpyridinium a-nitronyl nitroxide radical cations (p-BzPYNN) in acetonitrile shows a moderate and broad absorbance in near-IR region. In the crystal of this complex, two radical cations form a dimer via strong H-bonding interaction; such kinds of dimers are connected into H-bonding chain by [Ni(mnt)₂]^2- dianions through weak H-bonding interactions. The neighboring H-bonding chains are arranged into supramolecular sheet via π⋯π stacking interactions between the five-membered chelate-ring of anion and the superimposed pyridyl rings of cations. The polycrystalline EPR spectrum exhibits two isotropic EPR signals. Based on the analyses of crystal structure, variable temperature magnetic susceptibility and electronic spectrum, the stronger EPR signal is assigned to the radical cation, the weaker one probably arises from a trace amount of [Ni(mnt)₂]^1- species.

Original language	English
Pages (from-to)	786-788
Number of pages	3
Journal	Inorganic Chemistry Communications
Volume	13
Issue number	6
DOIs	https://doi.org/10.1016/j.inoche.2010.03.047
State	Published - Jun 2010

Keywords

EPR spectrum
Imidazolidines-nitronyl nitroxide radical
Near-IR
bis(maleonitriledithiolato)nickelate dianion

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10.1016/j.inoche.2010.03.047

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title = "A radical ion-pair complex exhibiting strong C-H⋯O H-bonding interaction, moderately broaden near-IR absorbance and complicated EPR spectrum",

abstract = "An ion-pair complex of [Ni(mnt)2]2- with p-N-benzylpyridinium a-nitronyl nitroxide radical cations (p-BzPYNN) in acetonitrile shows a moderate and broad absorbance in near-IR region. In the crystal of this complex, two radical cations form a dimer via strong H-bonding interaction; such kinds of dimers are connected into H-bonding chain by [Ni(mnt)2]2- dianions through weak H-bonding interactions. The neighboring H-bonding chains are arranged into supramolecular sheet via π⋯π stacking interactions between the five-membered chelate-ring of anion and the superimposed pyridyl rings of cations. The polycrystalline EPR spectrum exhibits two isotropic EPR signals. Based on the analyses of crystal structure, variable temperature magnetic susceptibility and electronic spectrum, the stronger EPR signal is assigned to the radical cation, the weaker one probably arises from a trace amount of [Ni(mnt)2]1- species.",

keywords = "EPR spectrum, Imidazolidines-nitronyl nitroxide radical, Near-IR, bis(maleonitriledithiolato)nickelate dianion",

author = "Liu, {Jian Lan} and Qi Liu and Sui, {Yun Xia} and Yao, {Bing Qian} and Ren, {Xiao Ming} and Hui Zhang and Duan, {Hai Bao} and Meng, {Qing Jin}",

year = "2010",

month = jun,

doi = "10.1016/j.inoche.2010.03.047",

language = "英语",

volume = "13",

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AU - Liu, Jian Lan

AU - Liu, Qi

AU - Sui, Yun Xia

AU - Yao, Bing Qian

AU - Ren, Xiao Ming

AU - Zhang, Hui

AU - Duan, Hai Bao

AU - Meng, Qing Jin

PY - 2010/6

Y1 - 2010/6

N2 - An ion-pair complex of [Ni(mnt)2]2- with p-N-benzylpyridinium a-nitronyl nitroxide radical cations (p-BzPYNN) in acetonitrile shows a moderate and broad absorbance in near-IR region. In the crystal of this complex, two radical cations form a dimer via strong H-bonding interaction; such kinds of dimers are connected into H-bonding chain by [Ni(mnt)2]2- dianions through weak H-bonding interactions. The neighboring H-bonding chains are arranged into supramolecular sheet via π⋯π stacking interactions between the five-membered chelate-ring of anion and the superimposed pyridyl rings of cations. The polycrystalline EPR spectrum exhibits two isotropic EPR signals. Based on the analyses of crystal structure, variable temperature magnetic susceptibility and electronic spectrum, the stronger EPR signal is assigned to the radical cation, the weaker one probably arises from a trace amount of [Ni(mnt)2]1- species.

AB - An ion-pair complex of [Ni(mnt)2]2- with p-N-benzylpyridinium a-nitronyl nitroxide radical cations (p-BzPYNN) in acetonitrile shows a moderate and broad absorbance in near-IR region. In the crystal of this complex, two radical cations form a dimer via strong H-bonding interaction; such kinds of dimers are connected into H-bonding chain by [Ni(mnt)2]2- dianions through weak H-bonding interactions. The neighboring H-bonding chains are arranged into supramolecular sheet via π⋯π stacking interactions between the five-membered chelate-ring of anion and the superimposed pyridyl rings of cations. The polycrystalline EPR spectrum exhibits two isotropic EPR signals. Based on the analyses of crystal structure, variable temperature magnetic susceptibility and electronic spectrum, the stronger EPR signal is assigned to the radical cation, the weaker one probably arises from a trace amount of [Ni(mnt)2]1- species.

KW - EPR spectrum

KW - Imidazolidines-nitronyl nitroxide radical

KW - Near-IR

KW - bis(maleonitriledithiolato)nickelate dianion

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DO - 10.1016/j.inoche.2010.03.047

M3 - 文章

AN - SCOPUS:77954216941

SN - 1387-7003

VL - 13

SP - 786

EP - 788

JO - Inorganic Chemistry Communications

JF - Inorganic Chemistry Communications

IS - 6

ER -

A radical ion-pair complex exhibiting strong C-H⋯O H-bonding interaction, moderately broaden near-IR absorbance and complicated EPR spectrum

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